package com.wuming.caiwu.util;

import org.apache.commons.codec.binary.Hex;

import java.security.MessageDigest;

/**
 * Created by hanfei on 16/5/9.
 */
public class SHAUtil {
    /***
     * SHA加密 生成40位SHA码
     *
     * @param inStr 待加密字符串
     * @return 返回40位SHA码
     */
    public static String shaEncode(String inStr) throws Exception {
        MessageDigest sha = null;
        try {
            sha = MessageDigest.getInstance("SHA");
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }

        byte[] byteArray = inStr.getBytes("UTF-8");
        byte[] md5Bytes = sha.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }

    /**
     * 测试主函数
     *
     * @param args
     * @throws Exception
     */
    public static void main(String args[]) throws Exception {
        String str = new String("123456");
        System.out.println("原始：" + str);
        System.out.println("SHA后：" + shaEncode(str));
//
//
//        String plainText = "BGUDMECQKTZJKGKZZCCYDBGHUNNFXTXN";
//
//        // 获取指定摘要算法的messageDigest对象
//        MessageDigest messageDigest = MessageDigest.getInstance("SHA"); // 此处的sha代表sha1
//
//        // 调用digest方法，进行加密操作
//        byte[] cipherBytes = messageDigest.digest(plainText.getBytes());
//
//        String cipherStr = Hex.encodeHexString(cipherBytes);
//
//        System.out.println(cipherStr);
    }
}
